From d1370b955f9a86c82f92d7368237ed96318de330 Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 19 Jul 2025 09:29:12 -0700
Subject: Allocate data from a stack allocator

---
 demos/checkerboard/checkerboard.c | 29 +++++++++++++++++------------
 demos/isomap/isomap.c             | 24 ++++++++++++++----------
 2 files changed, 31 insertions(+), 22 deletions(-)

(limited to 'demos')

diff --git a/demos/checkerboard/checkerboard.c b/demos/checkerboard/checkerboard.c
index 9d1791e..b408fc2 100644
--- a/demos/checkerboard/checkerboard.c
+++ b/demos/checkerboard/checkerboard.c
@@ -20,6 +20,9 @@ static const int TILE_HEIGHT  = TILE_WIDTH / 2;
 static const int WORLD_WIDTH  = 20;
 static const int WORLD_HEIGHT = 20;
 
+#define MEMORY_SIZE (2 * 1024 * 1024)
+uint8_t MEMORY[MEMORY_SIZE];
+
 static const TileDesc tile_set[] = {
     {.type   = TileFromColour,
      .width  = TILE_WIDTH,
@@ -35,6 +38,8 @@ static const TileDesc tile_set[] = {
      .colour = (Pixel){.r = 0xdc, .g = 0x76, .b = 0x84, .a = 0xff}},
 };
 
+#define NUM_TILES (sizeof(tile_set) / sizeof(tile_set[0]))
+
 typedef enum Colour {
   Black,
   White,
@@ -67,28 +72,28 @@ static bool init(GfxAppState* state, int argc, const char** argv) {
   (void)argc;
   (void)argv;
 
-  if (!(state->iso = isogfx_new(&(IsoGfxDesc){
-            .screen_width = SCREEN_WIDTH, .screen_height = SCREEN_HEIGHT}))) {
+  if (!((state->iso =
+             isogfx_new(&(IsoGfxDesc){.memory        = MEMORY,
+                                      .memory_size   = MEMORY_SIZE,
+                                      .screen_width  = SCREEN_WIDTH,
+                                      .screen_height = SCREEN_HEIGHT})))) {
     return false;
   }
   IsoGfx* iso = state->iso;
 
-  isogfx_resize(iso, SCREEN_WIDTH, SCREEN_HEIGHT);
-
-  if (!isogfx_make_world(
-          iso, &(WorldDesc){.tile_width   = TILE_WIDTH,
-                            .tile_height  = TILE_HEIGHT,
-                            .world_width  = WORLD_WIDTH,
-                            .world_height = WORLD_HEIGHT})) {
-    return false;
-  }
+  isogfx_make_world(
+      iso, &(WorldDesc){.tile_width   = TILE_WIDTH,
+                        .tile_height  = TILE_HEIGHT,
+                        .world_width  = WORLD_WIDTH,
+                        .world_height = WORLD_HEIGHT,
+                        .num_tiles    = NUM_TILES});
 
   const Tile black = isogfx_make_tile(iso, &tile_set[Black]);
   const Tile white = isogfx_make_tile(iso, &tile_set[White]);
   state->red       = isogfx_make_tile(iso, &tile_set[Red]);
   make_checkerboard(iso, black, white);
 
-  if (!(state->backend = iso_backend_init(iso))) {
+  if (!((state->backend = iso_backend_init(iso)))) {
     return false;
   }
 
diff --git a/demos/isomap/isomap.c b/demos/isomap/isomap.c
index b328bfa..efae7fd 100644
--- a/demos/isomap/isomap.c
+++ b/demos/isomap/isomap.c
@@ -5,6 +5,7 @@
 
 #include <assert.h>
 #include <stdbool.h>
+#include <stdint.h>
 
 static const int WINDOW_WIDTH  = 1408;
 static const int WINDOW_HEIGHT = 960;
@@ -14,6 +15,9 @@ static const int MAX_FPS       = 60;
 static const int SCREEN_WIDTH  = 704;
 static const int SCREEN_HEIGHT = 480;
 
+#define MEMORY_SIZE (2 * 1024 * 1024)
+uint8_t MEMORY[MEMORY_SIZE];
+
 typedef struct GfxAppState {
   IsoBackend* backend;
   IsoGfx*     iso;
@@ -28,30 +32,30 @@ static bool init(GfxAppState* state, int argc, const char** argv) {
   (void)argc;
   (void)argv;
 
-  if (!(state->iso = isogfx_new(&(IsoGfxDesc){
-            .screen_width = SCREEN_WIDTH, .screen_height = SCREEN_HEIGHT}))) {
+  if (!((state->iso =
+             isogfx_new(&(IsoGfxDesc){.memory        = MEMORY,
+                                      .memory_size   = MEMORY_SIZE,
+                                      .screen_width  = SCREEN_WIDTH,
+                                      .screen_height = SCREEN_HEIGHT})))) {
     return false;
   }
   IsoGfx* iso = state->iso;
 
-  isogfx_resize(iso, SCREEN_WIDTH, SCREEN_HEIGHT);
-
   if (!isogfx_load_world(iso, "/home/jeanne/Nextcloud/assets/maps/demo-1.tm")) {
     return false;
   }
 
-  if (!isogfx_load_sprite_sheet(
-          iso,
-          "/home/jeanne/Nextcloud/assets/tilesets/scrabling/critters/stag/"
-          "stag.ss",
-          &state->stag_sheet)) {
+  if (!((state->stag_sheet = isogfx_load_sprite_sheet(
+             iso,
+             "/home/jeanne/Nextcloud/assets/tilesets/scrabling/critters/stag/"
+             "stag.ss")))) {
     return false;
   }
 
   state->stag = isogfx_make_sprite(iso, state->stag_sheet);
   isogfx_set_sprite_position(iso, state->stag, 5, 4);
 
-  if (!(state->backend = iso_backend_init(iso))) {
+  if (!((state->backend = iso_backend_init(iso)))) {
     return false;
   }
 
-- 
cgit v1.2.3